LibWeb currently has no test suite or program. Let's change that :^)
test-web is mostly a copy of test-js, but modified for LibWeb.
test-web imports both LibJS/Tests/test-common.js and
LibWeb/Test/test-common.js
LibWeb's suite provides the ability to specify the page to load,
what to do before the page is loaded, and what to do after it's
loaded.
This also provides a test of document.doctype and its close sibling
document.compatMode.
Currently, this isn't added to Lagom because of CodeGenerators.
While profiling I noticed that gettid() was hitting gs register
twice, once for the initial fetch of s_cache_tid out of TLS for
the initialization check, and then again when we return the actual
value.
Optimize the implementation to cache the value so we avoid the
double fetch during the 99% case where it's already set. With
this change gettid() goes from being the 3rd most sampled function
in test-js, to pretty much disappearing into ~20th place.
Additionally add the same optimization to getpid().
btoa() takes a byte string, so it must decode the UTF-8 argument into
a Vector<u8> before calling encode_base64.
Likewise, in atob() decode_base64 returns a byte string, so that needs
to be converted to UTF-8.
With this, `btoa(String.fromCharCode(255))` is '/w==' as it should
be, and `atob(btoa(String.fromCharCode(255))) == String.fromCharCode(255)`
remains true.
With this, typing `"\xff"` into Browser's console no longer
makes the app crash.
While here, also make the \u handler call append_codepoint()
instead of calling an overload where it's not immediately clear
which overload is getting called. This has no behavior change.
It's broken for strings with characters outside 7-bit ASCII, but
it's broken in the same way as several existing functions (e.g.
charAt()), so that's probably ok for now.
If we know the width, but not the height, we have to *divide* with the
intrinsic ratio to get the height (not multiply.) :^)
This makes things like <img width=300 src=image.png> work right.
Images were added before replaced element layout knew about intrinsic
sizes, so this was a bit backwards. We now instead transfer the known
intrinsic sizes from the ImageLoader to the LayoutImage.
Presentation attribute lengths (width, height, etc.) can always be
unit-less (e.g "400") so going via the normal CSS parsing path only
works when the document is in quirks mode.
Add a separate parse_html_length() that always allows unit-less values.
The specification says that parts labelled as a "fragment case" will
only occur when parsing a fragment. It says that if it occurs when
not parsing a fragment, then it is a specification error.
We should probably assume at this point that it's an implementation
error. This fixes a few little mistakes that were caught out by this.
Also moves the context element outside insertion mode reset,
as other (unimplemented) parts refer to it, such as
"adjusted current node".
Also cleans up insertion mode reset.
Instead of using SoftCPU::eip() which points at the *next* instruction
most of the time, stash away a "base EIP" so we can use it when making
backtraces. This makes the correct line number show up! :^)
This works the same as gettid(). No sense in making a syscall to the
kernel every time you ask for the PID since it won't change.
Just like gettid(), the cache is invalidated on fork().
This allows us to look up source file/line information from addresses
without bloating the build too much. It could probably be made smaller
with some tricks.
The Audio applet now dislays the main mix volume next to the speaker
icon. A click on the applet still mutes the global mixer. By scrolling
the mouse wheel while on the applet, you can decrease/increase the mixer
volume. Different icons will be painted depending on the volume and the
mute state.
Happy listening :^)
We now track whether the flags register is tainted by the use of one or
more uninitialized values in a computation.
For now, the state is binary; the flags are either tainted or not.
We could be more precise about this and only taint the specific flags
that get updated by each instruction, but I think this will already get
us 99% of the results we want. :^)
A lot of software relies on the fact that mmap and shbuf memory is
zeroed out by the kernel, so we should consider it initialized from the
shadow bit perspective as well.
Previously, we would not care if the handshake timer timed out because
the server was too slow, or because we were too slow, this caused
connections to fail when the system was under heavy load.
This patch fixes this behaviour (and closes#2843) by checking if the
timeout delay was within margin of error of the max timeout.
This patch introduces the concept of shadow bits. For every byte of
memory there is a corresponding shadow byte that contains metadata
about that memory.
Initially, the only metadata is whether the byte has been initialized
or not. That's represented by the least significant shadow bit.
Shadow bits travel together with regular values throughout the entire
CPU and MMU emulation. There are two main helper classes to facilitate
this: ValueWithShadow and ValueAndShadowReference.
ValueWithShadow<T> is basically a struct { T value; T shadow; } whereas
ValueAndShadowReference<T> is struct { T& value; T& shadow; }.
The latter is used as a wrapper around general-purpose registers, since
they can't use the plain ValueWithShadow memory as we need to be able
to address individual 8-bit and 16-bit subregisters (EAX, AX, AL, AH.)
Whenever a computation is made using uninitialized inputs, the result
is tainted and becomes uninitialized as well. This allows us to track
this state as it propagates throughout memory and registers.
This patch doesn't yet keep track of tainted flags, that will be an
important upcoming improvement to this.
I'm sure I've messed up some things here and there, but it seems to
basically work, so we have a place to start! :^)
LibPThread: mark pthread_exit a noreturn function using compiler attributes
LibThread: remove a call to pthread_exit from Thread::start lambda expression
as it make the return of teh lambda unreachable.
This allows us to determine which mode to render the page in.
Exposes "doctype" and "compatMode" on Document.
Exposes "name", "publicId" and "systemId" on DocumentType.
ControlBoxButton consolidates the paint_event for buttons
used in composite box widgets like ComboBox and SpinBox. Its
button bitmaps are built with create_from_ascii like WindowFrame
and ScrollBar controls, making theming more uniform.
